The SC2 charger allows you to select charging current from 0.5A,1A,2A and 3A to manage the charging speed as you wish. With extremely low internal resistance. IMR batteries may be overcharged and lead to safety issues when charged in regular Li-ion battery chargers. To address this problem. The SC2 incorporates an optimized IMR charging system that is able to monitor the entire charging process. Ensuring end voltage is always within safe limits which ultimately helps extend battery life.